Protective alarm system



Nov. 22, 1927. i 1,650,288 u. D. M DANIEL PROflECTIVE ALARM SYSTEM Filed April 10, 1925 Patented Nov. 22, 1927.

JOHN MGDANIEL, Oil" VANCOUVER, BRITISH coLUMB'IA, CANADA. 6 4

PROTECTIVE- ALARM SYSTEM Application fled A rn 10, 1925. Serial m 22,178.

This invention relates to protective alarm systems and it particularly has for its ob'ect to provide a system employing two distlnct signaling circuits, one of which may be used to protect the openings to buildings such as windows,1doors, etc. and the other used with concealed switches, hold-up switches and the like to protect the interior of a building, each circuit including, at a central protective agency, a suitable signal giving de' vice operable to give an indication should the respective circuit be opened; the invention also has for its object to provide means as sociated and operable with the locking and [5 unlocking of the door of a building forgiving a signal to a central station attendant, through the medium of which he can tell whether the door has been locked or un-= locked and at what time, andfor connecte ing those portions of thetwo circuits which are within the protected building, in series with one another to operate in connection with the signal giving device of one of those circuits at the central ofiice and give an indi- 2 cation.

In other words the invention is a means to notify a central oflice whether the door of a building is locked or unlocked; also a means to protect the building against entrance from the outside when'the building islocked and to protect the inside area of the building .at all times.

Generically the invention resides in roviding a switching mechanism connecte vin two separate signaling circuits, such si alling circuits each including a circuit within a building and circuit connections with an external set of signals (located at the protective agency), said switch mechanism being connecte with the locking mechanism of a door of abuilding and arra-ged so that whenthe locking mechanism is in one position the signalling circuits will be maintained separately and when the locking mechanism is in another position the portions of the signalling circuits within the building will be connected in series and cooperate with the circuit connections of but one circuit leading from the building to the exterior signals. I y

The drawing illustrates diagrammatically the two circuits and the manner of connecting and disconnecting the same cooperatively with the locking and unlocking of the door.

In the drawing 2 represents one circuit. which, for convenience of reference we will call theinterior protection circuit, and 3 indicates the other circuit, which for convenfence of reference we will call the exterior protection circuit. The interior protection circuit maybe provided with the usual concealed circuit controllers and hold up switches, while the exterior protection circuit includes the usual circuit controllers located at windows-{doors and other places through which access is obtained or may be obtained to the building,

Both circuits 2 and 3care energized b batteries or otherwise and are normally closed so that they give an alarm. The circuit 2 extends throughout the interior of the building and passes out to a police station or to a private protective agency in the locality.

The circuit 3 extends around the-windows and doors of the building so that if the same are'interfered with the circuit will be broken and an alarm given to the same progtective agency to which the circuit 2 is conducted.

After the working hours of the bank. or other business having this system installed, it is desirable to connect the circuit 2 in series with the circuit 3 and this connection should be; automatically established cooperatively'with the locking of the main door affording ingress and egress. y

In the drawing the main door is represented 'as' bounded by the lines '4 and the slidable bolt by which the door is secured by 5. v v

=On the lock bolt 5 is a pin 6. which engages a bifurcation 7 on the end of one arm of a bell crank lever pivoted on the door at- 8. The other end of this lever is pin-connected .at 9 to a bar 10 which isvertically movable on a guide pin 11 secured to the door at the lower end of the bar.

Two parallel switch bars 12 and 14 are connected to the door 4 on suitable insulation at 13 and 15, which bars are connected require to be broken to to parallelwires of the circuit 3. These;

switch bars have a spring tendency to main tainthis circuit 3 closed on the contacts 18 and 19 respectively located on the opposite side ofthe vertically movable bar 10 from the springy bars connections. x

A similar switch bar 16 is connected at 17 a i to the door and to one of the wires of thecircuit 2 and has a spring tendency to maintain that clrcuit closed on a contact 20 on and 16 and will thereafter move I bars to break connection at 19 and 20 from 10 is delayed byan the other side of the bar.

The switch bar 12 is connected at 21 on suitable insulation to the vertically movable bar 10 to move with it. Downward movement on the bar .10 will then open thecir- Downward movement of the bar 10 will first close these contacts 25 and 26 on the contacts 27 and 28" of 'the switch'bars 14 these switch t heir respective lines 3 and 5 to lock the door The throwing of the bolt 4 will thus move the bar 10 downward and 3 at 18 and" in doing so willopen the. circuit 19 and the circuit 2 at 20, and will simultaneously connect the open end of the cir'-' cuit 2 with the circuit 3 at 22 and will conmet the other open end of the circuit 2 with the other wire of the circuit .3 at 28, 27 through the conducting member 24 bar10.

As it is desirable that the opening and closing of these contacts should occur a sen-. sible period after movement of the locking bolt '5, the downward movement of the bar air dash pot 30 secured to the door 4, in which dashpot is movable a piston .31 connected at 32. to the bar 10, and

. the pin 9 of the bell crank lever is mounted circuits.

spring in a die block 33 movable in an elongated slot 34 in the bar 10. The dieblock 33,is supported in the medial position between upper and lower springs 35, 36-, sothat as the bolt is thrown to secure the door, the lower spring 36 is compressed and the pressure of that spring is gradually exerted on the bar 10 to overcome the air resistance in the dash,

pot 30: Conversely, when the bolt 5 is moved ackward to release the door, the upper 35 is compressed and its pressure slowly acts to overcome the air resistance in the dash pct 30 tomove the bar 10 to the position in which the switch levers 12, 14 and 16 close the circuits2 and 3 as separate any suitable sig- At the protective station loyed. For connalling' device may be emp .venience of illustration Ihave indicated such device as follows: For the circuit 3 there is grovided a relay 37 which is adapted, when e-energized, to close a local circuit 39 which includes a signal 41. For the circuit 2 there is provided a relay 38 which, when deon the Operation.

Assume that the door is unlocked as indicated in full lines in the drawing At that time-circuit 3 will be connected withthe relay 37, which, being energized, keeps local circuit 39 open and signal 41 extinguished. In a like manner relay 48 is energized through circuit 2 and signal 42 is extinguished. Should entrance to the building be attempted through an unauthorized opening S (such unauthorized opening being protected by the circuit 3) circuit 3 will be broken, relay 37 will, be de-energized and signal 41 will be' energized, thus indicating to the attendant at the central station that the exterior protection circuit 3 of the building has been broken and some one has attempted to enterthe building at an unauthorized place.

Likewise should a hold-up occur the party 7 held up, by operating a concealed switch CS in circuit 2, breaks that circuit which deenergizes relay 38 and sets signal 42, thus indicating to the attendant at the protection station that a hold-up has occurred.

Assume that both circuits 2 and 3 are intact and relays :38 and 37 energized and signals 42" and '41 extinguished the building seesboth signals flash for an instant, and

then signal 42 comes on and stays -on he knows that the door has been locked and the circuits 3 and 2 within the protected building have been brought into series. Then should either the circuit 2 or circuit 3 within the protectedarea be broken, by some one attempting to enter'or leave the building or by some one concealed within the building coming into contact with a concealed switch the circuit will be broken causing tie-energizing of relay 38 and an operation of signal 42,'thereb indicating to the attendant that something protected building.

- Assume, however the combined circuit remains intact and next morning the door is unlocked. \Vhen the bolt 5 is thrown back tov the unlocked position spring 35wwill-be compressed, moving the bar 10 upwardly. This causes a momentary break of the circuit protected area to be either is wrong at the 2 While the circuits 2 and 3 are being switch-ed over to parallel agaln, causing a it is thought that the objects and utility of the invention and the mode of operation will be clear to those skilled in the art. i

What I claim is: 1. In a protective alarm system for the protection of buildings, two separate nor- ,mally closed and'energiz d circuits each ineluding a portion'within the building to be protected, and a portion in an exterior protective agencyand there including suitable signal giving devices, said signal giving devices being operated when the energizing circuits containing said signal giving devices are opened, a switch device operativelyconnected with a lock of a door of the building being protected and including means for electrically connecting said circuits, for maintaining said circuits in parallel when the door lockis in one position; and for switching the portions of the circuits'within the building being protected into series one with'the other when the lock is in another position. said switch device also including means to momentarily open each circuit effective to cause a signal to be momentarily given'when the switching operation takes place. 7

2. In a protective alarm system for the protection of buildings, two separate nor mally closed and energized circuits each in-' cluding a portion within the building to be protected, and a portion in an exterior protective agency and there including suitable signal giving devices. said signal giving de-- -v1ces being operated when the energizing circuits containing said signal giving-devices are opened, aswitch device cooperatively connected with a lock of a door of the building to be protected and including means for electrically connecting said circuits for maintaining said circuits in parallel when the door lock is in one position and for switching the portions of the circuit within the building being protected intoseries one with the other when the lock is in another position, said switch device also including means to momentarily open each circuit effective to cause a signal to be momentarily given when the switching operation takes place, said position and switch device including-means for disconnecting one of the circuits within the building protected from its signal giving device at the protective agency when the circuit portions within the in series. v 3, In a protective alarm system for buildings, two separate circuits normally closed and energized and each including a portion within the building to be protected and a portion located in a central protective agency and there including suitable signal giving devices, 'said signal giving devices being operable upon the opening ofsaid circuits,

means cooperative with the locking of a door of the building being protected for momentaril'y opening both circuits and then switching that ortion of one circuit which is located within the protected building into scries with that portion of the other circuit which is located within the protected build ingfor the purposes specified.

4. In a protective alarm system for build-v ings, two normally closed electric circuits each including a portion within the building to be protected and a-portion located in a central protective agency and there including signal giving instrumentalities. said signal.

giving instrumentalities each being arranged to indicate whether the circuit including it is open or closed; means cooperating with a bolt by which a door of the'building is secured for simultaneously opening both circuits and for connecting those portions of the circuits which are located within the building to be protected in-series with one another and with that portion of one of the circuits which extends from the building being protected to the protective agency.

5. In a protective alarm system. the combination with two normally closed separate signaling circuits, each including a circuit portion within a building to be proprotected building are tected and a circuit portion complementary thereto and connecting the same with a protective agency, the circuit portions at the protective agency including suitable signal giving instrumentalities. operable upon disturbance of either circuit portion within the building to give a signal on its correspondand in parallelism and for. opening the said circuits and then connecting that portion of one of the circuits within the protected area in series with the other circuit when the lock is operated for the purpose specified.

6. In a protective alarm system. the combination with two normally closed separate signalling circuits, each including a circuit portion within a building to be protected and a circuit portion complementary therei one of the circuits within the protected area lngs having a to be protected and a 80 signalling I 'in the building connection connection between said switching and the lock of a in series with the other circuit when the lock is operated, and means interposed in the between the door lock and the switch device for delaying the switching operation after the door is locked or unlocked for the purposes specified. 1 7. In a protective alarm system for build- I door with a lock, the combination with two distinct signalling circuits each including a portion within the building portion outside of the building, the latter portions containing signal giving instrumentalities operable upon openmgthe circuits; a switching device including switching elements .for each circuit;

whereby one of said circuits may be'broken and'a portion of the same connected in series with the other circuit at times, and'a device door whereby the action the door will cfof locking and unlocking switching device feet the operation of the for the purposes specified.

8. In aprotective alarm system, the combination with two' normally closed parallel circuits including portions in the building to be protected and portions with signalling devicesat a distant station operable upon opening the circuits,.and a looking 'bolt on a door of the building being protected; a circuit changing switch device associated with said circuits and adapted when in one position to maintain the circuits parallel and when in another position to connect the portions of the circuits withbeing protected'inseries with the portion ,of one of the circuits at the distant station, and operative connections between said'locking bolt and said device for efiecting the movements otthe same.

9. In a protective alarm system, the comoperable upon disturb-M a signal to the correspond for normally Leeaaee bination with two normally closed parallel signalling circuits including portions in the building to be protected and portions with signalling devices at a distant station operable upon opening the circuits, and a locking bolt on a door of the building being protected; a circuit changing switch device associated with said circuits and adapted when in one switch device for delaying its action with relation to the movement of the locking bolt. 10. In protective alarm systems wherein is provided two distinct normally closed signal circuits connected with a central agency at which the circuits include suitable signal' giving instrumentalities operable upon disturbance of the normal condition of the circuits; 1 a switching device comprising elements for each circuit whereby one of said circuits may be broken and a portion of the same connected in series with the other cir-' cuit at times, a door lock and a connection between said switching device and the door lock whereby the action of locking and unlocking the door will effect the operation of the switching device.

11. In a protective alarm system wherein two distinct normally closed signal circuits are provided; a switch device for switching said glrcuits from parallel circuits to a condition where one circuit is broken and a por-* tionof the same isconnected in series with the other circuit, said switchin device comprising a support, a door docking bolt mounted on the support, a bell crank lever connected with the bolt and pivoted on the support, a slide bar slidably mounted on the support, a dash pot cooperating with the slide bar for delaying its movements, a connection between said bell crank lever and saidslide barincluding spring elements, a

plurality of spring contact members mount- W ed on said support, fixed contact members on said support associated with said spring contact members. and means carried by said slide bar for effecting the position of said spring contact memberswith relation to said fixed contact members according to the movements of said slide bar. p

In testimony whereof I afiix my signature.

Joini- D. MoDANIEIi. 

